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    <!-- 三角形的最大周长 -->
    <script>
      var large = function (A) {
        //对数组进行排序
        A.sort((a, b) => a - b)
        //对排序后的数组从后往前遍历返回周长 ，否则直接返回0
        for (let i = A.length - 1; i >= 2; --i) {
          if (A[i - 2] + A[i - 1] > A[i]) {
            return A[i - 2] + A[i - 1] + A[i]
          }
        }
        return 0
      }
      console.log(large([2, 1, 2]))
    </script>
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